Tool-holder.



V. H. AURICH & A. CIHAK.

TOOL HOLDER.

APPLICATION EILED JULY 15. w16.

1,230,647 PtentedJune19,1917.

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VICTOR H. AURICH AND ALOIS CI-'I-IAK, vOF JERSEY CITY, NEW JERSEY.

' l TooLHoLnER.

Specification of Letters Patent.

Patented June 19, v1917.

Application inea July 15, 191e. .serial no. 159,460.

CIHAK, a vsubject of the Emperor ofAusj v tria, both residents of JerseyCity, in' the county of Hudson and State of New Jersey, have invented anew and improved Tool- Holder, of which the following is a full, clear,and exact description.

Among the principal objects which the present invention has in view are:to provide mechanical means for controlling the path of operation of ametal-cutting tool; to provide means for setting the radius of the pathof the cutting edge of said tool; and to provide a scale for setting thecutting tool and the radius of operation thereof.

In the drawings is shown a table 17 on a base 39, which is Xedly mountedon a slidingifeed table 40. The table 40 has side rails and acentralzbridge 41 on which the cross slide 42 is slidably disposed.

The table 40 has end extensions which fit the rails 43 of a conventionallathe and is provided with the usual hand feed wheel 44 and automaticclutch 45. The cross slide 42 is provided with a hand-operated feedmechanism embodying the rotary handle 46.

Vhen the table 40 and cross slide 42 are operated in accordance with thepresent invention, the wheel 44, clutch 45 and handle 46 are released soas not to interfere with the movement of the table 40 and cross slide 42which are controlled by the invented tool holder.

The table 17 is pivotally Connected with a bell crank lever 46, one armof which is pivotally connected by a bolt 47, to a plate 48. The plate48 is permanently mounted by bolts 49 on lthe cross slide 42. Theopposite arm of the lever 46 is pivotally connected by a link bar 50with a bracket 51. The bracket 51 is made fast to the back rail 43 ofthe lathe. The bolt 52 forms the movable adjustable pivot for the cranklever 46.

The table 17 is turned by means of a worm 53, which is operated from ahandle 54 mounted on the table 40 at the front of the lathe by means ofthe bearing bracket The handle 54 is operatively connectedwith .the worm53 by means of a flexible shaft 56.k

The table 28 and tool post 27 are held oii the cross slide 42 in theconventional manner, the said cross slide being provided with anundercut slot 57 to receive the said tool post.

The tool 28 having been set and the bolt 52 having been disposed in thetable 17 and in the slot 18 thereof, the attendant feeds the machine byturning the handle 54. This rotates the table 17 which moves the bolt 52on the half circle away from the work 0r toward the work as the case maybe. If the bolt 52 is moved away from the fwork the resulting cut in themetal being operated upon is a concave groove, which is the result ofthe combined movement of the cross slide 42 transverse the lathe and themovement of the table 40 lengthwise thereof. It is obvious that if thetable 17 is turned from the position shown in Fig. 1 of the drawings, sothat the said table is moved clockwise as per the arrow el, the lathemechanism 46 and link 50 coperate to draw the cross slide 42 toward thecenter of the work, which is shown by dotted lines in said figure, whilethe link 50 operates as a brace resting on the stationary bracket 51,which enables the table 17 to move forward with the table 40 the fulllength of the cut to be performed. The sum of the two movements producedthe out desired.

It is equally evident that if the table 17 be rotated in the directionreverse to that indicated by the arrow al, the reverse movement of thecross slide 42 would be effected but the same movement of the table 40would result. This would produce the convex cut` referred to anddescribed as the result of the operation of the mechanism shown in'Figs. 1 and 2.

Claims.

otally connecting said rocking means and said pivot bracket; and meansmanually operative for rotating said rotary table.

2. In a tool-holder, the combination of a pivot bracket adapted to berigidly mounted on a lathe bed at the side of the rails thereof; arotary table having a positioning slot coinciding with the center ofsaid table; a movable pivot mounted in said slot; means for locking saidpivot in said slot; a freelymovable cross slide; a tool and tool posttherefor mounted on said slide; rocking means pivotally connecting said.pivot on said rotary table and said slide; a link pivotally connectingsaid rocking means and said pivot bracket; and means manually operativefor rotating said rotary table, said means embodyin a screw-threadedmember engaging said ta le7 a rotary handle, and a flexible shaftoperatively connecting said screw-threaded member and said handle.

VICTOR H. AURICH. ALOIS CIHAK.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

